[SunHELP] (no subject)

[P Nutton]

Suchitra wrote:

> Hi ,
> 
>      My present setup has 2 SSA 112's ( mirrored) and 2 SSA114's(
mirrored)
> i need to migrate all to A5200 disk arrays .
> But SSA112s and SSA114s use a dfferent hardware setup as regards to A5200
> disk arrays .
> I will be connecting my A5200 disk arrays with FCAL SBUS host adapters.
> while as my SSA's are on SCSI interface.
> 
> Also my SSA112's are being used for the root disk group. root  filesyetem
> is encapsulated.
> SSA112's contains 12 4.2GB harddisks .
> The new A5200 disk arrays will contain 7 * 36.4 GB hardisks .
> 
> Is there any document to help me plan the migration with out loosing the
> data..

If you are using Veritas volume manager you can use vxrelayout, vxevac or
vxassist.
If you are using solstice disksuite, you can add a third mirror on the new
disks and move that way. Both are documented in SunSolve, I can find
references if you wish (but I expect from your crossposting to SSA managers
you will have them by now...)

It's not a good idea to have root on the SSAs, ditto I expect with the
A5200s unless you are clever with split loops on the FCAL.

You may find your A5200 arrays are slower than your SSAs for multi user
small file random access due to a smaller number of spindles. We have
retained 3 SSAs (90 spindles) for a samba server for PC files and it
outperforms a T3 pair (16 spindles) used for the same purpose.
-- 
Paul Nutton, naff company disclaimer to follow...
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